Spanish language Q&A Forum

why do we use preterito perfecto compuesto for 'I saw' and 'I found', i thought 'i found' would be encontre and 'I saw', yo vi not he contrado and he visto. thanks!

Greetings everyone!
Why is Después de que has lavado los platos podrás ver un poco la tele

incorrect?

I continue to have exactly the same problem as the users below.  Your team really needs to fix this.

Yo ________ que sí. Why is the answer he dicho and not hube dicho? I thought hube dicho is in Pretérito Perfecto and he dicho is in the present perfect. The quiz question says to answer in Pretérito Perfecto. 

Hi, I'm really struggling with this one, and there are only two possibilities!  It's "Aquí tienes 20 euro por si……. dinero para un taxi.", with the options of necesitas and necesitaras. The questions says that the speaker thinks there's a low probability of the money being needed.  The correct answer is the imperfect subjunctive, necesitaras.  I suppose that it has to be that because the present indicative is not permissible in this structure, but I don’t know why.

Thanks in advance,

Dave

I was doing one of the writing exercises and the sentence given was, "I decided to wait and see if a car passed by to call for help." I figured the translation of "passed by" would be "pasera" (past subjunctive), but the answer given was "pasaba." Why wouldn't we need to use subjunctive here since it's uncertain whether a car will actually pass by?